Pump buying FAQ

Pumpscart (pumpscart.com) is run by Synergy Automatics. It is an online portal for industrial, commercial and agricultural pumps and pumping solutions in India.

Offices are located at 51/74, Pattara Vakkam, Kanchina Kuppam, Ambattur, Chennai, Tamil Nadu 600098, and A 1102, Neco Sky Park, Vishalnagar, Pimple Nilakh, Pune 411027. You can call +91 92299 52299 or email sales1@pumpscart.com or pumpscartindia@gmail.com.

Pump prices depend on the exact model, motor rating, materials, seal options and accessories, and the same pump family can vary widely in cost. For this reason, Pumpscart does not show prices on product pages and provides a quote on request.

Requesting a quote also lets the team check that the pump you have chosen suits your duty. If a different model would perform better or cost less to run, they can suggest it before you order.

Pumpscart is not an authorised dealer or distributor of the brands shown unless otherwise stated. When you order, the supply is liaised with the local authorised distributors and dealers of the brand.

For you, this means a single point of contact for selection and enquiry, while the product comes through the manufacturer's authorised channel. Pumpscart's association with brands helps with installation, sales and support.

Pumpscart covers a wide range of industries, including mining and explosives, biogas, agriculture, chemical, food, textile, waste water treatment, ceramic, defence, marine and offshore, pharma, power plants, pulp and paper, steel, sugar, oil and gas, edible and palm oil, paint, varnish and ink, dye stuff, man-made fibres, cosmetics and herbal, toiletries, winery, HVAC and RO.

Each industry has its own needs, such as hygienic designs for food, corrosion-resistant materials for chemicals or solids handling for wastewater.

Yes. Pumpscart supplies pumps from Indian manufacturers such as Kirloskar, Crompton, CRI, Texmo, Shakti, Deccan, Suguna, Usha, V-Guard and Oswal, as well as international brands such as Grundfos, Wilo, Xylem, Ebara, Flowserve, Interpump, Pratissoli, Annovi Reverberi, CAT Pumps and Flojet.

International brands are often chosen for specialised duties such as high pressure plunger pumps or hygienic process pumps, while Indian brands offer wide ranges for water supply, agriculture and general industry.

Discounts are decided by the Pumpscart team on a case-by-case basis, and offers cannot be combined. If you are buying several pumps for a project, mention the full list, quantities and delivery schedule in your enquiry so the team can consider it when preparing the quote.

Please note that Pumpscart may refuse or limit orders. For larger requirements, sending complete technical data early helps avoid changes later, as order changes are accepted only up to 48 hours before delivery.

Often, yes. Send the nameplate details (make, model, flow, head, motor power, speed and voltage) along with photos of the pump and its pipe connections.

If the original model is no longer available, the team can suggest an equivalent pump that matches the duty point and fits the existing foundation and pipework as closely as possible. In some cases a newer, more efficient model can reduce running costs compared with the old pump.

Flow rate is the volume of liquid a pump delivers in a given time, usually stated in LPM, m³/h or GPM. Head is the height to which the pump can lift the liquid, expressed in metres, and reflects the pressure it develops.

Total head includes the vertical lift plus friction losses in pipes, valves and fittings, and any pressure needed at the outlet, such as for sprinklers or RO membranes. Every centrifugal pump has a curve showing how flow falls as head rises, so a pump must be selected for the required flow at the actual total head.

Add together three components:

• Static head: vertical distance from the water level to the highest discharge point
• Friction losses: losses in pipes, bends, valves and filters, which increase with flow and smaller pipe sizes
• Pressure head: any pressure required at the outlet (roughly 10 m of head per 1 bar)

For borewells, measure from the pumping water level, not the borewell depth. Adding a reasonable margin is wise, but heavy oversizing wastes energy.

Centrifugal pumps suit thin liquids such as water at moderate pressures and high flows. They are simple, compact and widely available from brands like Grundfos, Kirloskar and Wilo.

Positive displacement pumps, such as gear, lobe, diaphragm, progressive cavity and plunger pumps, deliver a nearly constant flow regardless of pressure. They are better for viscous liquids, shear-sensitive products, accurate dosing and very high pressures. As a rule, choose centrifugal for water-like liquids and high flow, and positive displacement for thick liquids, precise flow or high pressure at low flow.

Liquid properties often decide the pump type and materials:

• Viscosity: thick liquids such as oils and syrups need positive displacement pumps
• Corrosiveness: acids and alkalis need SS 316, polypropylene, PVDF or lined pumps
• Solids: sewage and slurries need non-clog or slurry pumps
• Temperature: hot liquids need suitable seals and may affect suction conditions
• Specific gravity: heavier liquids need more motor power

Always mention the liquid's full name and concentration when asking for a quote.

NPSH (net positive suction head) describes the pressure available at the pump inlet compared with the liquid's vapour pressure. If the available NPSH is lower than what the pump requires, the liquid partly vaporises inside the pump. This is called cavitation.

Cavitation causes noise, vibration, loss of performance and pitting damage to impellers. To avoid it, keep suction lifts short, use larger suction pipes, minimise bends and valves on the suction side, and take extra care with hot liquids. Submersible or flooded-suction installations reduce NPSH problems.

Single-phase motors are common for domestic and light commercial pumps, typically up to about 1.5–2 HP, where only a single-phase supply is available. Three-phase motors are more efficient, run more smoothly and are standard for larger industrial and agricultural pumps.

Check the supply at your site and its voltage stability before choosing. In rural areas with low or fluctuating voltage, select a pump rated for a wide voltage range and use a good starter with protection.

An oversized pump delivers more flow than needed, so users often throttle a valve to control it. The pump then runs away from its best efficiency point, wasting energy and increasing vibration, seal wear and bearing loads.

In borewells, oversizing can draw the water level down too far, causing dry running. Selecting a pump close to the actual duty point, or using a VFD where demand varies, gives lower running costs and longer pump life.

Match wetted materials to the liquid:

• Cast iron: clean water, general utility
• Bronze impellers: water with mild corrosion
• SS 304: clean water, food, mild chemicals
• SS 316: chlorides, process chemicals, pharma and food
• Polypropylene and PVDF: many acids and alkalis
• Hard metal or rubber lining: abrasive slurries

Seals and elastomers such as EPDM, FKM (Viton) and PTFE must also suit the liquid and temperature.

A multistage pump has two or more impellers arranged in series on one shaft. Each stage adds pressure, so the pump develops high head while keeping a compact size.

Multistage pumps, available in horizontal and vertical designs from brands such as Grundfos, Ebara, Wilo and CRI, are used for pressure boosting in buildings, boiler feed, RO plants, washing systems and high-rise water supply. They suit clean liquids, as solids can wear the close clearances between stages.

A hydro-pneumatic system combines one or more pumps with a pressure vessel and controls to maintain steady water pressure in a building or plant. The vessel stores pressurised water and reduces frequent pump starts during small demands.

Modern systems often use VFD-driven multistage pumps that adjust speed to demand, saving energy and keeping pressure constant at taps. They are widely used in apartments, hotels, hospitals and industries instead of, or alongside, overhead tanks.

Borewell submersible pumps are slim, multistage units designed to fit inside 4, 6, 8 inch or larger borewells and lift water from depth. Openwell submersibles are shorter and wider, suited to wells, sumps and tanks with ample space.

Sewage submersible pumps have non-clog, vortex or cutter impellers to pass solids and fibres, and are used in sumps, septic tanks and lift stations. Brands such as Kirloskar, Crompton, Texmo, Shakti and Xylem offer these ranges.

Dosing and metering pumps deliver small, accurate and adjustable quantities of liquid, usually chemicals, into a process. Common types are diaphragm, plunger and peristaltic designs.

Typical uses include chlorine dosing in water treatment, antiscalant dosing in RO plants, pH correction, coagulant and polymer dosing in effluent plants, and additive dosing in food and chemical processes. Selection depends on flow range, discharge pressure, chemical compatibility and whether the dosing must follow a control signal.

Plunger pumps are positive displacement pumps in which ceramic or hardened plungers move back and forth to pressurise water. They develop very high pressures at relatively low flows, and ultra-high pressure versions go further still.

They are used in hydro jetting, hydro blasting, high pressure cleaning, vehicle washing, hydro testing, descaling, misting systems and sewer jetting. Brands on Pumpscart include Interpump, Pratissoli, Annovi Reverberi, CAT Pumps and Hemmelmann. Correct nozzle sizing, relief valves and clean, filtered inlet water are essential for long life.

Diaphragm pumps move liquid using a flexing diaphragm and check valves, so the liquid never contacts a shaft seal. Air-operated double diaphragm (AODD) pumps need no electric motor at the pump, making them useful in flameproof areas.

They handle viscous liquids, slurries, abrasive and corrosive chemicals, and shear-sensitive products, and they can run dry without damage. Common uses include chemical transfer, paint and ink, ceramic glazes, sludge and tank emptying. Electrically driven diaphragm pumps, such as those from Flojet, are also used for smaller transfer and spraying duties.

Rotary lobe pumps use two rotating lobes that do not touch each other, moving liquid gently with low shear. They suit viscous products, liquids with soft solids and hygienic applications such as food, dairy, cosmetics and wine.

Magnetic drive pumps transmit power through a magnetic coupling and a sealed shell, eliminating the shaft seal. They are used for hazardous, toxic or expensive liquids where leakage must be avoided, but they need clean liquid and protection against dry running.

A jet pump is a surface pump that uses an ejector to create suction and lift water from shallow or moderately deep wells. Shallow-well jet pumps work up to roughly 7–8 m of suction lift, while deep-well versions use an ejector placed in the well.

Jet pumps are easy to access for maintenance but are less efficient than submersible pumps. For deeper borewells or higher flows, a submersible pump is usually the better choice.

Before installation, confirm the following:

• The nameplate matches your order and supply voltage
• The foundation is level and rigid
• Suction and discharge pipes are supported independently, not hanging on the pump
• Suction piping is short, airtight and at least the size of the pump inlet
• Electrical protection includes a suitable starter, overload relay and earthing

Read the manufacturer's installation manual, as requirements vary by pump type.

Most centrifugal surface pumps are not self-priming, so the casing and suction pipe must be completely filled with liquid before starting. Close the discharge valve, open the priming plug, fill until liquid flows out without bubbles, then close the plug.

A foot valve at the end of the suction line holds the water when the pump stops. If the pump repeatedly loses prime, check for air leaks at suction joints or a leaking foot valve. Never start the pump dry, as this can damage the mechanical seal within seconds.

Many pumps rely on the liquid for cooling and lubrication of seals and bearings. Running dry causes overheating, seal failure, and in submersible and magnetic drive pumps, damage to internal parts.

To prevent it, use dry-run protection relays, level switches or float controls in tanks and sumps, and pressure switches on booster systems. For borewells, make sure the pump is installed below the lowest expected water level. Diaphragm pumps are an exception and can tolerate dry running.

Watch for these warning signs:

• Reduced flow or pressure compared with normal
• Unusual noise, such as rattling that may indicate cavitation
• Increased vibration
• Leakage from the mechanical seal or gland
• Higher motor current or overheating
• Frequent tripping of the starter

Investigating early usually means a simpler repair. Keeping a simple log of pressure and current makes changes easier to spot.

There is no fixed interval, as life depends on the liquid, operating hours, temperature and installation quality. Seals handling clean water at moderate temperature can last a long time, while those exposed to abrasives, chemicals or dry running fail much sooner.

Replace seals when leakage becomes visible or steady, and bearings when noise, vibration or temperature rise. Follow the manufacturer's lubrication schedule, and keep spare seals for critical pumps to reduce downtime.

Practical steps include:

• Operate pumps close to their best efficiency point
• Replace throttling valves with VFD speed control where flow varies
• Use IE3 or higher efficiency motors
• Size pipes generously to reduce friction losses
• Repair leaks and remove unnecessary bends and valves
• Restore worn impellers and wear rings

Over a pump's life, energy usually costs far more than the pump itself, so efficiency is worth considering at purchase.

Drain the pump completely, especially where freezing or corrosive residues are possible, and flush it with clean water if it has handled chemicals or slurry. Plug openings to keep out dust and insects, and store it in a dry, covered place.

Rotate the shaft by hand every few weeks to prevent seals from sticking and bearings from developing flat spots. Before restarting, check insulation resistance of the motor, turn the shaft freely, prime the pump and check rotation direction.

Pumpscart ships orders within India through courier partners such as BlueDart, DTDC and India Post. The choice of courier depends on your location and the size of the shipment.

Once the order is dispatched, you will receive the courier name and tracking number so you can follow the shipment. Courier policies apply to each consignment, so please keep the tracking details handy if you need to follow up on a delivery.

Delivery usually takes 3 to 5 working days from placing the order, subject to courier policies. Regular delivery timings are 9:00 am to 7:00 pm.

Some factors are outside Pumpscart's control, such as curfews, public holidays, incorrect or incomplete addresses and courier delays. Providing a complete address with landmark, pin code and a reachable phone number helps avoid failed deliveries.

Orders for next-day delivery must be placed before 3 pm. Availability of next-day delivery depends on the product and your location, so confirm with the Pumpscart team when placing the order.

For urgent requirements, such as a breakdown replacement, share the exact model, quantity and delivery address as early as possible so the team can check what can be arranged.

The delivery address can be changed only before the order is dispatched. Changes to the order itself are accepted up to 48 hours before delivery, with any monetary adjustment needed for the change.

If you need to make a change, contact Pumpscart as early as possible by email at sales1@pumpscart.com or by phone at +91 92299 52299, quoting your order details.

Up to 3 delivery attempts are made. If you expect to be away, arrange for someone at the address to receive the package, or track the shipment using the courier name and tracking number provided.

For heavy pumps, make sure someone is available to help unload and that the delivery location is accessible. Inspect the package on receipt, as damage must be reported within 24 hours.

Damaged deliveries must be reported within 24 hours of delivery, with proof. Photograph the packaging, shipping label and damaged parts, and note the damage on the delivery receipt if possible.

Send the photos and your order details to sales1@pumpscart.com or pumpscartindia@gmail.com, or call +91 92299 52299. Do not install or operate a pump with visible damage, as this may cause further harm and complicate the claim.

Returns and cancellations are handled according to Pumpscart's Return and Cancellation Policy page, which sets out the conditions and process. Please read it before placing an order, especially for project or custom-configured pumps.

Pumpscart may refuse or limit orders. Discounts are decided by the Pumpscart team and offers cannot be combined. If you have questions about a specific order, contact the team with your order details.